Merge pull request dockersamples#107 from lucj/master

Add k8s specifications

Author: Mano Marks

README.md

@@ -21,6 +21,27 @@ Once you have your swarm, in this directory run:
 docker stack deploy --compose-file docker-stack.yml vote
 ```
 
+Run the app in Kubernetes
+-------------------------
+
+The folder k8s-specifications contains the yaml specifications of the Voting App's services.
+
+Run the following command to create the deployments and services objects:
+```
+$ kubectl create -f k8s-specifications/
+deployment "db" created
+service "db" created
+deployment "redis" created
+service "redis" created
+deployment "result" created
+service "result" created
+deployment "vote" created
+service "vote" created
+deployment "worker" created
+```
+
+The vote interface is then available on port 31000 on each host of the cluster, the result one is available on port 31001.
+
 Architecture
 -----
 
@@ -36,4 +57,4 @@ Architecture
 Note
 ----
 
-The voting application only accepts one vote per client. It does not register votes if a vote has already been submitted from a client.
+The voting application only accepts one vote per client. It does not register votes if a vote has already been submitted from a client.

k8s-specifications/db-deployment.yaml

@@ -0,0 +1,20 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: db
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: db
+    spec:
+      containers:
+      - image: postgres:9.4
+        name: db
+        volumeMounts:
+        - mountPath: /var/lib/postgresql/data
+          name: db-data
+      volumes:
+      - name: db-data
+        emptyDir: {} 

k8s-specifications/db-service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: db
+spec:
+  type: ClusterIP
+  ports:
+  - port: 5432
+    targetPort: 5432
+  selector:
+    app: db
+  

k8s-specifications/redis-deployment.yaml

@@ -0,0 +1,20 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: redis
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+      - image: redis:alpine
+        name: redis
+        volumeMounts:
+        - mountPath: /data
+          name: redis-data
+      volumes:
+      - name: redis-data
+        emptyDir: {} 

k8s-specifications/redis-service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis
+spec:
+  type: ClusterIP
+  ports:
+  - port: 6379
+    targetPort: 6379
+  selector:
+    app: redis
+  

k8s-specifications/result-deployment.yaml

@@ -0,0 +1,14 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: result
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: result
+    spec:
+      containers:
+      - image: dockersamples/examplevotingapp_result:before
+        name: result

k8s-specifications/result-service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: result
+spec:
+  type: NodePort
+  ports:
+  - name: "result-service"
+    port: 5001
+    targetPort: 80
+    nodePort: 31001
+  selector:
+    app: result

k8s-specifications/vote-deployment.yaml

@@ -0,0 +1,14 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: vote
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: vote
+    spec:
+      containers:
+      - image: dockersamples/examplevotingapp_vote:before
+        name: vote

k8s-specifications/vote-service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: vote
+spec:
+  type: NodePort
+  ports:
+  - name: "vote-service"
+    port: 5000
+    targetPort: 80
+    nodePort: 31000
+  selector:
+    app: vote
+  

k8s-specifications/worker-deployment.yaml

@@ -0,0 +1,14 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: worker
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: worker
+    spec:
+      containers:
+      - image: dockersamples/examplevotingapp_worker
+        name: worker